CLONE_DETACHED and exit notification (was user-vm-unlock-2.5.31-A2)

[Jamie Lokier]

Ingo Molnar wrote:
> Why is CLONE_DETACHED such a big problem for you, why do you want to force
> a more expensive notification method?

Eh?  I _like_ CLONE_DETACHED, and I want notification cheaper, not
more expensive.

You've said that pthread_exit() _always_ notifies a sibling thread using
a futex.

Well, can we please move the futex wakeup into the kernel?  That is all
I ask.  It will make pthread_exit() _faster_, and me happy because
all exits are notified.

-- Jamie